NXP Semiconductors S9S08DZ128F2MLHR

Overview

S9S08DZ128F2MLHR from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 128 KB Flash, 8 KB RAM, and integrated CAN 2.0A/B controller, ADC, TPM, SCI, SPI, I²C, and RTC - designed for automotive body electronics and industrial control requiring robust real-time operation at up to 20 MHz bus frequency.

For engineers reviewing the S9S08DZ128F2MLHR datasheet, S9S08DZ128F2MLHR pinout, S9S08DZ128F2MLHR application, or S9S08DZ128F2MLHR equivalent, this device supports dual-clock domain operation (FLL/PLL), on-chip voltage regulation, low-voltage detection with interrupt/reset, and background debug via single-wire interface - critical for ECU firmware development and production validation.

Technical Context

The S9S08DZ128F2MLHR implements the HCS08 CPU core with 40-MHz instruction execution (20-MHz bus), supporting up to 32 interrupt sources and featuring a Multi-Purpose Clock Generator (MCG) with FLL, PLL, and internal reference trimming (±1.5% over temperature). It integrates a 24-channel 12-bit ADC with 2.5 µs conversion time and internal bandgap reference (1.18–1.21 V).

Its peripheral set includes MSCAN (CAN 2.0A/B compliant), two SCIs with LIN 2.0/SAE J2602 support, two SPIs, two I²Cs, three TPM modules (6+2+4 channels), and RTC with external crystal option - all operating in Run, Wait, and Stop3 modes. The MCG supports external crystal inputs from 31.25 kHz to 16 MHz, with DIV32 and RDIV configurable for precise clock synthesis.

Key Specifications

Pinout & Package

100-pin Low-Profile Quad Flat Pack (LQFP), 0.5 mm pitch, 14 mm × 14 mm body size, exposed thermal pad (MLHR suffix denotes this package).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit automotive microcontroller applications.

Compared with S9S08DZ128F2MLHR, MC9S08DZ96F2MLHR offers identical peripheral compatibility at lower memory cost, while S9KEAZ128AMLH delivers architectural modernization and CAN FD readiness - both require PCB layout review due to different package footprints and power delivery requirements.

Availability

S9S08DZ128F2MLHR is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, smart power distribution, and medical sensor aggregation requiring stable component supply, long-lifecycle support, and AEC-Q100 qualification traceability.

Supply support for S9S08DZ128F2MLHR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in microcontrollers dating back to Motorola and Freescale.

The S9S08DZ128F2MLHR belongs to the HCS08 DZ-series, engineered specifically for cost-sensitive, safety-aware automotive body electronics where CAN integration, low-power operation, and field-proven reliability are mandatory.

FAQ

What is the maximum bus frequency supported by the S9S08DZ128F2MLHR?

The S9S08DZ128F2MLHR supports a maximum bus frequency of 20 MHz, derived from its 40-MHz HCS08 CPU core via a 2:1 divider. This frequency is achievable using the internal FLL with external crystal input (e.g., 8 MHz crystal → PLL ×4 → 32 MHz DCO → ÷2 = 16 MHz bus) or direct oscillator configuration. All timing-critical peripherals - including CAN, ADC, and TPM - are synchronized to this bus clock, and their maximum operating rates are specified relative to it in the datasheet.

Does the S9S08DZ128F2MLHR include an integrated CAN transceiver?

No, the S9S08DZ128F2MLHR integrates only the CAN protocol controller (MSCAN module), not the physical layer transceiver. It requires an external CAN transceiver (e.g., TJA1042, MCP2551) connected to its RX/TX pins (PTA0/PTA1) to drive the CAN bus. The MSCAN module handles message framing, arbitration, error handling, and filtering per ISO 11898-1, but level-shifting, dominant/recessive voltage generation, and bus termination remain external responsibilities.

What is the purpose of the DIV32 bit in the MCGC3 register of the S9S08DZ128F2MLHR?

The DIV32 bit (bit 4) in the MCGC3 register of the S9S08DZ128F2MLHR enables a divide-by-32 factor applied to the external reference clock before it enters the FLL when RANGE = 1. This allows use of higher-frequency crystals (up to 16 MHz) while maintaining the FLL's required 31.25–39.0625 kHz reference range. However, DIV32 must be cleared when PLLS = 1 (i.e., when PLL mode is selected), as confirmed in the Rev. 2 addendum - failure to clear it prevents proper PLL lock.

Can the S9S08DZ128F2MLHR operate from a single 3.3 V supply?

Yes, the S9S08DZ128F2MLHR operates across a supply voltage range of 3.0 V to 5.5 V, making 3.3 V fully compliant. At 3.3 V, all specifications - including maximum bus frequency (20 MHz), ADC accuracy (12-bit), and CAN timing - remain valid per the electrical characteristics table. However, the internal bandgap reference (1.18–1.21 V) and low-voltage detection thresholds scale with VDD, so LVD trip points must be recalculated accordingly for 3.3 V system design.

How is debug access implemented on the S9S08DZ128F2MLHR?

Debug access on the S9S08DZ128F2MLHR uses a single-wire background debug interface (BDM) via the BKGD/MS pin (Pin 3). This interface supports non-intrusive code download, breakpoint setting, register inspection, and real-time bus capture without halting CPU execution. No additional pins or UART bootloaders are required - only a compatible debugger (e.g., PE Micro Cyclone Pro, SEGGER J-Link with BDM firmware) and proper pull-up on BKGD/MS during normal operation.